@anon291751: Years ago I was taught how to cut and lay granite to an ashlar pattern. I learned from my grandfather who came to this country from outside Rome with this trade in 1903. You can see many examples of a true 2 and 1 pattern all over our great country. Some of the finest work you'll see is in churches.
In the small southern Rhode Island town where I live, the granite industry left its mark with carvings, statues, architectural details second to none right down to curbings for lawns. I had a real desire to learn who made all of this fancy stone work. I was fortunate to be selected to serve another apprenticeship as a granite cutter in a monument shop under a statue carver who had his skills passed down to him from previous generations.
You should visit this town and surrounding areas. This was one of the last areas where large efforts came together to accomplish great feats that will last forever.